Answer:
mass of 1 mole of 127 grams, KCI, 552mL = 51.1099987g
Explanation:
Answer:
35 amu
Explanation:
In an atom, only masses of protons and neutrons are relevant. electrons are so small in size that their masses are negligible.
The mass of 1 proton/neutron is 1amu.
Answer:

Explanation:
Hello there!
In this case, according to the given information, it is possible to recall the equation to calculate the heat, Q, in these calorimetry problems as shown below:

Thus, given the absorbed heat, mass and temperatures, we can easily calculate the specific heat of the metal as shown below:

Then, by plugging in we obtain:

Best regards!
The atomic number is the number of protons
The answer is Selenium.
Hope that helps.